21078267

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:359

約数の個数: 32

約数和(自身を含む): 33214464

約数和(自身を除く): 12136197

約数列:

[1, 3, 7, 21, 67, 71, 201, 211, 213, 469, 497, 633, 1407, 1477, 1491, 4431, 4757, 14137, 14271, 14981, 33299, 42411, 44943, 98959, 99897, 104867, 296877, 314601, 1003727, 3011181, 7026089, 21078267]

約数ペア:

[(1, 21078267), (3, 7026089), (7, 3011181), (21, 1003727), (67, 314601), (71, 296877), (201, 104867), (211, 99897), (213, 98959), (469, 44943), (497, 42411), (633, 33299), (1407, 14981), (1477, 14271), (1491, 14137), (4431, 4757)]